Recently got asked what is the difference and wanted to post to the larger group here.
TLDR: Use v1 only
V1 starts from 100 and reduces points as it checks the competition.
V2 both takes away and adds back points, Alas that makes it much more complicated to get the scores accurate.
V1 is the only one that is validated right now. I need to hide v2 until I can work out the issues with it.